Chair



April' 9, 1935. H. T. HALLOWELL CHAIR Filed May 25, 1952 5 Shgeets-Sheehl Ira/"9% fla wed Patented Apr. 9, 1935 CHAIR Howard Hallowell,Jenkintown, to Standard Pressed Steel 00,, a corporation of PennsylvaniaPa., assignor J enkintown, Pa.,

Application May 25, 1932, Serial No. c13,491

1 Claim. (01. 155-157) The object of my invention is tomake a chair in asimple and substantial manner and to pro .vide the chair with anadjustable support fora back rest. 1 l I This object I attain in thefollowing manner, reference being had to the accompanying drawings, inwhich: r i

Fig. 1 is a side view of my improved chair;

Fig. 2 is a sectional plan view on the line 2-2, Fig. 1, showing thechair seat in dotted lines; 1

Fig. 3 is a rear View of theback rest;

Fig. 4 is a plan view of the back rest;

Fig. 5 is a detached perspective view of the adjustable support for theback rest; f l

Fig. 6 is a side view showing the improved back rest supportas appliedto a modified form of seat frame; and p Fig. 7 is a plan view of theseat frame shown in Fig. 6. l

Referring to Figs. 1 and 2 of the drawings,l is one type of base of thechair to which my invention is applied, consisting in the presentinstance of four bent legs, which are welded at their upper ends to'atubular socket 3, into which extends the stem 4 is clamped 5 and 6 bymeans of stem 4 of theseat sectiom This between two shaped bars rivetsor bolts 1. Each bar has a central semicircular portion which partiallyencircles the rivets l are applied the stem is rigidly held bebetweenthe two bars5 and 6. Theseshaped bars are bent as shown in Fig. 2and'have ears 8 at their ends, bent horizontally and secured to theunder side of the seat 9 byscrews ID or other fastenings.

l l is a backrest securedto the heavy bent wire support l2 by means ofaclamp bar l3 shaped to partly encircle the rounded surface of thesupport. Clamp screws I 4, on which are wing nuts 15 in the presentinstance, tightly clamp the back rest into the position to which itis'adjusted.

The supports are bent rearwardly so thatthe en tire area of the seatcan" be used without inter-5 ference, and the long ends l6 extendthrough openings l1 in the arms I9 ofthe bars 5 and-6.

and the. ends of the arms of the support are" threaded at 28, and on thethreaded portion of the arms are two wing nuts 2| and 22. One of thesewingnuts is on one side of the forward arms IQ of the bars and the otherwing nut is on the rear side thereof, so that the back rest can beadjusted towards or from. the occupant of the seat by turning the wingnuts, and when the back rest is in the proper position to support theback,

the nuts are screwed tightly against the arms l9 with beveled corners.made in the present instance of plates bent to form angle bars, and theupper end of each leg l to the frame at the corners.

tangular base frame 25,

of the bars to support the back rest rigidly in position.

TENT.

' While I have shown my invention as applied to 7 a swivel chair, itwillbe understood that it can be applied to othertypes of chair frameswithout departing from the essential features of the invention.

Referring to the modification shown in Figs.

. 6 and 7, 25 is a rectangular base framemade of four strips of metalbent at the ends and welded together to form a complete rectangularframe 26'are the legs, which are is flattened to fit against the beveledcornersof the frame 25, and these flat surfaces are welded '21 are twoangle plates which extend transversely above the recand the horizontalpor tions 28 of these angle plates are secured to the seat section 9a byscrews or other fastenings which pass through slots in the said plates.tical portions. 29 of the angle plates are riveted to perforated plates30, Fig. 6,the rivets passing through holes in the flanges 29 of theplates 30, and through holes in the angle plates- The plates 30. have aseries of perforations 31 near each side passage of screw bolts 32,which extend through one of the perforations at each side of the plate30. This arrangement allows for vertical adjust-.

ment of the seat section andalso allows the seat section tolbe tilted toaccommodate the occupant accommodate the occupant in a comfortable po'-,

sition. The seat can also be tilted forward when desired. v i

The two rods I6 which supportthe back rest extend through perforationsin the plates 21. f

The thumb nuts 2! 'andZZ, are adapted tothe threaded portions of therods; Qnethumbnut 2| on each rod is mounted at the The verand the mainframe I is slotted at 33 for the upper end of the tubular stem, so thatwhen the outer side of the forward plate 2l,and the other nuts 2| aremounted at the inside of said plate. By turning these nuts the back restcan be adjusted to accommodate the occupant of the'seat. The rods I6 ofthe back rest are supported at the forward and rear ends of the seatstructure, and can bereadily adjusted longitudinally and firmly heldafter adjustment by the two sets of set screws. I claim: t

; combination of'a chair seat; a seat frame secured to'the underside ofthe seat, said frame having vertical members near the front and rear ofthe seat; the members being perforated for the passage of the arms of aback support; a

back rest; a U-shaped back support consisting of an upper cross memberand two arms spaced apart; a transverse clamp engaging thearms ofthesufifioftbelow the cross member: clamp screws for' adfiustablysecuring the clamp and back rest to the arms of'the support, thelowerportions of the arms of the support being bent to extend horizontallyunder the seat and freely through the perforations in the back andfront" providingforward and rearward adjustment of the back' rest inrespect to the seat;

VHOWARD 'r. HALLOWELL.

